'tweenbrain

"'tweenbrain" in a Sentence (2 examples)

Deep within the brain is a biologically ancient section called the diencephalon or tweenbrain.

The brainstem constituents include the medulla oblongata, pons varolii, midbrain, and tweenbrain.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.